#include <iostream>
int calculo(int n1,int n2,char op);

using namespace std;
int main()
{
    int n1,n2;
    char op;
    cin>>n1;
    cin>>n2;
    cin>>op;
    cout<<calculo(n1,n2,op)


}
int calculo(int n1,int n2,char op)
{
    switch(op)

    case '+':
    return n1+n2;
    break;

    case '-':
    return n1-n2;
    break;

    case '*':
    return n1*n2;
    break;

    case '/':
    return n1/n2;
    break;












}
